Case IH 11012 – Armrest Controller (TMF) or Auxiliary Remote Controllers (AUX67 or AUX89): 1st remote MODE LEVER potentiometer is failed high.

The controller is receiving a signal voltage from the 1st remote valve's mode lever potentiometer that exceeds the maximum allowable threshold (typically near or above a 5V reference limit), indicating an open ground, short to power, or internal failure.

• STX Steiger
• Case IH Magnum series
• Case IH Puma series
• Case IH Steiger series
• Case IH Maxxum series

1. 1

   Remove the armrest cover and visually inspect the wiring harness leading to the 1st remote mode lever for pinched wires, chafing, or disconnected pins.

2. 2

   Perform a ground circuit test using a multimeter at the potentiometer connector (an open ground causes the signal voltage to default high).

3. 3

   Test the signal wire for a short to the 5V reference or 12V power supply.

4. 4

   Perform a potentiometer sweep test by back-probing the signal wire with the connector plugged in (key ON, engine OFF). Move the lever through its full range; voltage should scale smoothly between 0.5V and 4.5V. If stuck at 5.0V or drops out entirely, the potentiometer is internally failed.

1. 1

   Power Down

   Turn off the tractor, remove the key, and disconnect the negative battery cable to prevent shorting sensitive armrest electronics.

2. 2

   Access the Armrest

   Remove the retaining screws for the right-hand armrest control console cover. Carefully lift the cover to expose the electro-hydraulic (EH) remote levers.

3. 3

   Disconnect the Lever

   Locate the 1st remote lever (usually color-coded, often blue or green depending on the stack position). Unplug the electrical connector at the base of the lever assembly.

4. 4

   Remove the Assembly

   Remove the mounting screws or retaining bracket holding the lever/potentiometer assembly in the armrest housing.

5. 5

   Install the New Part

   Seat the new potentiometer or complete EH lever assembly into the bracket and tighten the mounting hardware.

6. 6

   Reassemble and Calibrate

   Plug the electrical connector back in, reinstall the armrest cover, and reconnect the battery.

7. 7

   Calibration

   Turn the key ON. Navigate to the tractor's Pro 700 / AFS display monitor (or use the dealer electronic service tool) to perform a 'Remote Valve Lever Calibration' so the controller can learn the new potentiometer's exact minimum, maximum, and neutral voltage values. Clear the inactive 11012 fault code.